A further experiment on two-dimensional decaying turbulence on a rotating sphere

Yoden, S. and Ishioka, K. and Hayashi, Y.-Y. and Yamada, M. (1999) A further experiment on two-dimensional decaying turbulence on a rotating sphere. Il nuovo cimento C, 22 C (6). pp. 803-812. ISSN 1826-9885

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A series of numerical experiments on the two-dimensional decaying turbulence is performed for a non-divergent barotropic fluid on a rotating sphere by using a high-resolution spectral model. Time variations of the energy spectrum and the flow field are highly dependent on the rotation rate. In non-rotational cases, isolated coherent vortices emerge in the course of time development as in the planar two-dimensional turbulence. As the rotation rate increases, however, the evolution of the flow field changes drastically, and a westward circumpolar vortex appears in high-latitudes as well as zonal band structures in mid- and low-latitudes. The dependence of these features on the initial energy spectrum is investigated and the dynamics of such pattern formations is discussed.

Item Type: Article
Additional Information: Paper presented at the International Workshop on “Vortex Dynamics in Geophysical Flows”, Castro Marina (LE), Italy, 22-26 June 1998.
Uncontrolled Keywords: Convection, turbulence, and diffusion ; Pattern selection; pattern formation ; Turbulence simulation and modeling ; Conference proceedings
Subjects: 500 Scienze naturali e Matematica > 550 Scienze della Terra
Depositing User: Marina Spanti
Date Deposited: 11 Oct 2019 14:57
Last Modified: 11 Oct 2019 14:57
URI: http://eprints.bice.rm.cnr.it/id/eprint/13671

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